Filteeing appaeatus



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FILTERING APPARATUS.

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INVENTOR 2 /yaw/ w zzzk ATTORNEYS.

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(Nd-Model.)

.W. BALZ, FILTERING APPARATUS.

No. 515,894. Patented Mar. 6, 18-94.

INVENTOH g fi' BY l nmrme s.

(NQ Moel.) 3 Sheets-Sheet, 3.

W. BALZT, FILTERING APPARATUS.

No. 515,894. 4 Patented Mar. 6, 1894.

I E; V 4- WITNESSES:

m% L 4M i fig WW/2 INVENTOH PATENT Pr on.

WILHELM BALZ, OF FLONHEIM, GERMANY.

FILTERING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 515,894, dated March 6, 1894.

Application filed April 18, 1893. Serial lio'."470,887.

To osZZ whom it may concern.-

day of August, 1892,

surrounding these filtering Be it known that I, WILHELM BALZ, asubject of the German Emperor, residing in Flonheim, near Bingen-on-tl1e-Rhine, in the Grand Duchyof Hesse, Germany, have invented certain new and useful Improvements in Filtering Apparatus, (for which I have obtained Letters Patent in France on the 8th No. 223,538,) of which the following is a specification.

The object of this invention is to provide a filtering epparatus'in which the fluid to be filtered is first conducted into a space bounded by two filtering platesconnected with each other-{then passes through a filtering mass plates and finally passes into the hollow space of asecond douhie filtering plate and from there passes to the inner wall of the vat or vessel containing the filtering apparatus and flows oft through vertical grooves in said vessel or vat. Said inlet and outlet double filtering plates are preferably arranged in several rows above each other in a manner that the inlet and outlet plates alternate and are separated from each other by a homogeneous filtering mass.

In the accompanying drawings, Figure l is a vertical transverse central section through my improved filtering apparatus. Fig. 2 is a plan-view of one-hell. of the same, the cover of the vet being removed. Fig. 3 is a planview, showing the upper and lower plates of one of the double inlet filtering plates, parts being broken out. Fig. at represents a vertical dinmetrioal. section of this improved filtering apparatus in which the spindle for actuciting the mechanism for compressing the plates, extends through the bottom plate and the bottom of the vat.

Similar letters of reference indicate like parts in all the drawings.

The filtering plates are placed into acircular vat or vessel a, the sides of which preferably decrease in thickness from top to the bottom. On the bottom of this vat a supporting beam 1) is arranged, upon which an aperturcd filtering plate 0 rests, which is provided in its upper surfacewith horizontal grooves (Z.

Upon the filtering plate 0 a cage screen e rests, the outer Walls of which are in close same manner as the inlet filtering contact with the annular walls of the val: a.

The said cage-screen c, which may be lined let and outlet double filtering plates, which are placed in the same in the following man ner. Upon the bottom of the cage-screen a layer fabout-an inch and ono-half in thickness, of any suitable filtering substance, is placed, and upon this layerfau inlet double filtering plate 9 is placed. This double inlet filtering plate g consists of two rigidly connected circular apcrtured disks, which are held separated from each other by radial separating strips. It, so that a space -z is formed between said disks, which space is divided by the separating strips it into a series of chambers. The upper disk is provided at its center-with a rigidly scoured short neck 7c, andis in communication with the space i formed between tlie siiid disks. Through this neck the fluid to be filtered is conductedin-to the space iof the double filtering plate 9'. Each of the two disks of the double fiiQlriug platcgis covered on the outside with it screenelothor wire-netting. plate g is open at its outer edge and has less diameter than the vat a or the cage-screen c, and the annular spacebetwecn the rim of the double filtering plate ,1 and the side of the cage-screen c, is filled with filtering mass. 021 the upper surface of the filtering plate (1 a layer of filtering mass is applied, and upon this it double outlet filtering plate mis placed. The litter is formed and constructed in the plate 9, but is not provided at the middle with a neck but with an opening n extending through both disks, through which opening the neck of the inlet filtering plate gprojects. Around the said neck the opening is filled with afiltering mass. The outlet plate or has greater diameter, so that its outer edge rests against the inner wall of the cage-screen. Upon this outlet plate in another laycrfol' filtering material is placed, upon this a second inlet plate g is arranged, which dili'ers from the other only that it has a neck k of greater diameter and is provided in its lower disk with a hole through which the neck 7a of the first inlet filtering plate can pass, the lower neck in projecting some distance into the second neck 7:. In this manner inlet and outlet plates are arranged alternately and each following inlet plate 9 has a neck 70 of greater diameter than that of the inlet plate next below it. Upon permost inlet plate 9 a screemplate c is arranged, which corresponds to the screen-plate c resting on the supporting beam 12 of the vat but is merely reversed. The neck 7cof the uppermost inlet filtering plate is closed at its top but has a side-opening which is connected by a hose or flexible tubeo with a cook 13 passing through the side of the vat. Through this cook the liquid to be filtered is forced under pressure into the apparatus. Before admitting the liquid a small cock q is opened, which is connected with the cock 1) and through which the air displaced by the 'entering liquid can escape. The enteriugliquid passes into the necks 7c of the several inlet filtering plates g and passes from the same into the several spaces of said inlet filtering plates. It is distributed into several chambers and passes through the holes in the disks of the filtering plates into the mass f, and after passing through the latter passes into the chambers of the outlet plates m and passes through the outer rims of; the same through the wallsof the cage-screen e intothe vertical grooves r in the inner wall of the vat a. In the said vertical grooves the filtering liquid flows down upon the fioor of the vat and is drawn off from the same through the cock 5. Through the top and bottom filtering plates 0, which are not constructed as double plates, the liquid also passes. The liquid that has passed through the top filtering plate 0 also fiows down through the grooves r to the hottom of the vat. So that the filtered liquid is absolutely clear, the filtering mass between the several filtering plates must be properly compressed, and this is accomplished by able hand-wheel.

means of the following devices. On the top filtering plate 0 two bridges t are placed and on the samea transverse beam it rests, which can be pressed down by means of a screw-spindle '0 provided at its upper end with a suit- The screw-spindle '0 passes through a nut that is fixed in the transverse beam wparallel to the bridges t, the ends of which beam w are held in notches in the walls of the vat near the upper edges of the same. After the filtering mass has been compressed sufficiently by turning the screw-spindle '0 the hand wheel from the upper end of the spindle is removed, a packing-ring is placed on the upper edge of the sides of the vat and upon said packing-ring the cover as is placed. The spindle 1; passes through a stuffing-box of the cover-plate, so as to form a tight joint, and for the purpose of pressing the cover firmly on the top edge of the vat the nut 'g is used, through which nut the spindle passes, which nut is held on the beams 2 so that when the spindle is turned the nut and the beams z are pressed down on the cover and the latter is pressed on the top of the vet.

The above described filtering device can the layer of filtering mass upon the up- Tclaim as new, and desire also be constructed as shown in Fig. t. In this construction the screw-spindle 2' passes successively through all the filtering plates and through the bottom of the vat. The washer is placed on that part of ithe spindle projecting from the bottom of the vat and then a key is driven through the projecting end of the spindle. The spindle is provided w. th a series of annular steps or shoulders N where it passes through the bottom filtering plates, so as to form a tight joint and to prevent the liquid to be filtered from running off. Above these annular steps or shoulders the spindle passes through the several necks 7;, which are enlarged correspondingly, and then passes through astutfing-box of theuppermost neck 7a. The beam u and bridges t on the uppermost filtering plate are pressed upon the same by turning the nut l. The cover of the stuffing-box of the top neck It is only tightened after the partshave been compressed as stated. The cover of the vat is pressed down in the manner previously described.

The apparatus herein described can be made of wood, metal or partly of wood and partly of metal. The metal parts must be tinned, in case they are not made of brass.

Having thus described my invention, what to secure by Letters Patent, is-- i 1. In a filtering apparatus, the combination of a series of doubleinlet filtering plates having central openings, a series of double outlet filtering plates having central openings and arranged in alternation with the inlet filtering plates, an inlet pipe communicating with said central openings, a filtering mass disposed between said inlet and outlet filtering plates, and a cage screen surrounding said filtering plates and filte ring mass, substantially as set forth.

2. In an apparatus for filtering, the combi- I nation vith a vat having vertical grooves in the inner surface of its side-wall, a cagescreen placed in said vat and a series of alternating double inlet filtering plates 9 and double outlet filtering plates m placed in said cage-screen and layers of filtering mass between the several filtering plateasubstantially as set forth.

In a filtering apparatus, the combination,

with a vat, of a cage-screen in the same, a series of alternating double inlet filtering plates g and double outlet filtering plates m in said cage-screen, the double inlet filtering plates 9 havingless diameter than the double outlet filtering plates m, the said plates gbeing provided with a neck at, the center, the neck of each inlet plate projecting through the adjacent outlet plate and into the bottom of the neck of the next higher inlet plate,

substantially as set forth.

l. In a filtering apparatus, the combination or" a vat, a series of alternating double inlet and outlet filtering plates, filtering material between said filtering plates,

the inlet plates- 2o of a vat, aseries of alternating double inlet beingprovided with a neck at the center, the lower neck projecting into the neck above, the neck of the uppermost plate being closed and provided with a tube extending through 5 the walls of the vat, a screw spindle extending through said neck, and means actuated by said screw spindle for imparting pressure to said plateasubstantially as set forth.

5. In a filtering apparatus, the combination 1a with a vat, of a series of alternating double inlet and outlet filtering plates, filtering mass between said several plates, the inlet plates each being provided with a neck at the center,

the neck of each inlet plate projecting up 15 ward and into the bottom of the next inlet plate above, the neck of the uppermost inlet plate being closed and a tube extending through the walls of the vat to said closed top inlet neck, substantially as set forth.

6. In afiltering apparatus, the combination ing through said neck, and means actuated by said screw spindle for imparting pressnre to said plates, said spindle having an enlarged lower end provided with a tapering steppedportion which engages the lower filtering plate. v

In testimony that I claim the foregoing as 3 5 my invention I have signed my name in presence of two subscribing witnesses.

WILHELM BALZ'.

Witnesses:

PAUL GOEPEL, CHARLES 'SCHROEDER. 

